Liquid crystal display device having touch and three-dimensional display functions and method for manufacturing the same

ABSTRACT

Disclosed are a liquid crystal display device having touch and three-dimensional display functions and a method for manufacturing the same. The liquid crystal display device includes a touch and three-dimensional image display panel adhered to a liquid crystal panel through an adhesive layer, wherein the touch and three-dimensional image display panel includes a lower substrate provided with first and second electrodes for realizing a three-dimensional image, a upper substrate provided with third and fourth electrodes for sensing touch and a common electrode for realizing the three-dimensional image, and a liquid crystal display filled between the upper and lower substrates.

This application claims the benefit of Korean Patent Application No.10-2011-0135511, filed on Dec. 15, 2011, which is hereby incorporated byreference as if fully set forth herein.

BACKGROUND

1. Field of the Disclosure

The present disclosure relates to a liquid crystal display device, andmore particularly, to a liquid crystal display device having touch andthree-dimensional image display functions, and a method formanufacturing the same.

2. Discussion of the Related Art

In keeping with dramatic advances in information technology, displays tovisualize electronic information signals have been rapidly developed.Various slim, lightweight, and low-power flat display devices arecommonly used as alternatives to conventional cathode ray tubes (CRTs).

Examples of flat display devices include liquid crystal displays (LCDs),plasma display panels (PDPs), field emission displays (FEDs),electroluminescent displays (ELDs) and the like. These flat displaydevices necessarily require a flat display panel to realize an imagewherein the flat display panel has a structure in which a pair oftransparent insulating substrates are joined such that an inherentluminous or polarized material layer is interposed between thesubstrates. Among flat display devices, liquid crystal display devicescontrol light transmittance of liquid crystals using an electric fieldto display an image. For this purpose, an image display device includesa display panel including liquid crystal cells, a backlight unit toirradiate light to the display panel and a driving circuit to drive theliquid crystal cells.

The display panel is formed such that a plurality of gate lines cross aplurality of data lines to define a plurality of unit pixel regions. Thedisplay panel includes a thin film transistor array substrate and acolor filter array substrate that face each other, a spacer interposedbetween the thin film transistor array substrate and the color filterarray substrate to maintain a predetermined cell gap, and a liquidcrystal inserted into the cell gap.

The thin film transistor array substrate includes a plurality of gatelines and a plurality of data lines, a thin film transistor formed as aswitching device at each intersection between the gate line and the dataline, a pixel electrode arranged in each liquid crystal cell andconnected to the thin film transistor, and an orientation film coated onthe resulting structure. The gate lines and data lines receive signalsfrom driving circuits through respective pad portions.

In response to scan signals supplied to the gate lines, the thin filmtransistor transfers pixel voltage signals from the data lines to thepixel electrode.

In addition, the color filter array substrate includes color filtersarranged in respective liquid crystal cells, a black matrix to partitionthe color filters and reflect external light, a common electrode tosupply a reference voltage to the liquid crystal cells, and anorientation film coated on the resulting structure.

The thin film transistor substrate and the color filter array substratethus separately formed are arranged and then joined such that the twosubstrates face each other, liquid crystal is injected into a regionprovided between the substrates and the region is sealed, therebycompleting fabrication of the liquid crystal display device.

There is an increasing need for the liquid crystal display device thusfabricated including a touch panel, wherein a predetermined portion istouched by the hand or a separate input means and separate data can betransferred in response to the touch, and a three-dimensional imagedisplay panel to display a three-dimensional image. The touch panel andthe three-dimensional image display panel are applied to the liquidcrystal display by adhering the same to the outer surface of the liquidcrystal display.

A conventional liquid crystal display wherein a touch panel and athree-dimensional image display panel are mounted on a liquid crystaldisplay device will be described with reference to the annexed drawings.

FIG. 1 is a sectional view illustrating a conventional liquid crystaldisplay device including a touch panel and a three-dimensional imagedisplay panel.

As shown in FIG. 1, the conventional liquid crystal display deviceincluding the touch panel and the three-dimensional image display panelbroadly includes a liquid crystal panel 50, a three-dimensional imagedisplay panel 60 and a touch panel 70 formed in this order from thebottom. The liquid crystal panel 50, the three-dimensional image displaypanel 60 and the touch panel 70 are adhered to one another through afirst adhesive layer 55 and a second adhesive layer 65. Here, the firstand second adhesive layers 55 and 65 comprise double-sided adhesives.

The liquid crystal panel 50 includes first and second substrates 10 and20 that face each other, a liquid crystal layer 25 filled between thefirst and second substrates 10 and 20, color filter layers 21 (21 a, 21b, 21 c) formed on the second substrate 20, and a first polarizing plate31 and a second polarizing plate 32 formed on the outer surfaces of thefirst and second substrates 10 and 20.

Also, the three-dimensional image display panel 60 includes a thirdsubstrate 41 provided with electrodes made of a transparent material, afourth substrate 42 provided with a black matrix layer (not shown), anda liquid crystal layer 45 filled between the third and fourthsubstrates.

An inner configuration of the touch panel layer 70 is changed intovarious forms according to driving mode of the touch panel.

The conventional liquid crystal display device including a touch paneland a three-dimensional image display panel have the following problems.

First, as described above, the three-dimensional image display panel andthe touch panel are adhered to the liquid crystal, display devicethrough an adhesive, thus increasing a thickness and a weight of theliquid crystal display.

Second, the respective panels should be adhered through an adhesive,thus making the overall manufacture process complicated.

Third, the respective panels use separate substrates and the overallprocess is complicated, thus increasing manufacture costs.

SUMMARY

A liquid crystal display device includes a touch and three-dimensionalimage display panel adhered to a liquid crystal panel through anadhesive layer, wherein the touch and three-dimensional image displaypanel includes: a lower substrate provided with first and secondelectrodes for realizing a three-dimensional image; a upper substrateprovided with third and fourth electrodes for sensing touch and a commonelectrode for realizing the three-dimensional image; and a liquidcrystal display filled between the upper and lower substrates.

In another aspect of the present invention, provided is a method formanufacturing a liquid crystal display device including a touch andthree-dimensional image display panel adhered to a liquid crystal panelthrough an adhesive layer, the method including: forming first andsecond routing lines for realizing a three-dimensional image on a lowersubstrate of the touch and three-dimensional image display panel;forming a first protective film over the entire surface of the lowersubstrate including the first and second routing lines and forming aplurality of first contact holes in the first routing line; forming aplurality of first electrodes on the first protective film such that thefirst electrodes are electrically connected to the first routing linethrough the first contact holes; forming a second protective film overthe entire surface of the lower substrate including the first electrodesand forming a plurality of second contact holes in the second routingline; forming a plurality of second electrodes on the second protectivefilm such that the second electrodes are electrically connected to thesecond routing line through the second contact holes; forming third andfourth routing lines for sensing touch on an upper substrate of thetouch and three-dimensional image display panel; forming a plurality ofbridges on the upper substrate to connect electrodes arrayed in anX-axis direction; forming a third protective film over the entiresurface of the substrate and forming a plurality of third contact holesin the third and fourth routing lines and the bridges; forming X- andY-axial electrodes on the third protective film such that the X- andY-axial electrodes are connected to the third and fourth routing linesand the bridges through the third contact holes; forming a fourthprotective film over the entire surface of the substrate; forming acommon electrode for realizing the three-dimensional image on the fourthprotective film; and joining the upper substrate and the lower substratesuch that the upper substrate faces the lower substrate, and forming aliquid crystal layer between the upper substrate and the lowersubstrate.

It is to be understood that both the foregoing general description andthe following detailed description of the present invention areexemplary and explanatory and are intended to provide furtherexplanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this application, illustrate embodiment(s) of the invention andtogether with the description serve to explain the principle of theinvention. In the drawings:

FIG. 1 is a sectional view illustrating a conventional liquid crystaldisplay device including a touch panel and a three-dimensional imagedisplay panel.

FIG. 2 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a first embodiment of the present invention.

FIG. 3A to 3E are a plan view and a sectional view illustrating a methodfor manufacturing the liquid crystal display device having touch andthree-dimensional display functions according to the first embodiment ofthe present invention, and specifically, a plan view and a sectionalview illustrating a process of a lower substrate (third substrate) ofthe touch and three-dimensional image display panel;

FIGS. 4A to 4E are a plan view and a sectional view illustrating amethod for manufacturing the liquid crystal display device having touchand three-dimensional display functions according to the firstembodiment and specifically, are a plan view and a sectional viewillustrating a process of an upper substrate (fourth substrate) of thetouch and three-dimensional image display panel;

FIG. 5 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a second embodiment of the present invention;

FIG. 6 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a third embodiment of the present invention;

FIGS. 7A to 7I are a plan view and a sectional view illustrating theliquid crystal display device having touch and three-dimensional displayfunctions according to the third embodiment of the present invention,and specifically, are a plan view and a sectional view illustrating aprocess of a fourth substrate (upper substrate) of the touch andthree-dimensional image display panel;

FIG. 8 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a fourth embodiment; and

FIG. 9A to 9G are a plan view and a sectional view illustrating a methodfor manufacturing the liquid crystal display device having touch andthree-dimensional display functions according to the fourth embodimentof the present invention, and specifically, a plan view and a sectionalview illustrating a process of an upper substrate (fourth substrate) ofthe touch and three-dimensional image display panel.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Reference will now be made in detail to the preferred embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings. Wherever possible, the same reference numbers will be usedthroughout the drawings to refer to the same or like parts.

The liquid crystal display device having touch and three-dimensionaldisplay functions and a method for manufacturing the same according tothe present invention will be described in more detail with reference tothe annexed drawings.

First Embodiment

FIG. 2 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a first embodiment of the present invention.

As shown in FIG. 2, the liquid crystal display device having touch andthree-dimensional display functions according to a first embodiment ofthe present invention broadly includes a liquid crystal panel 50 and atouch and three-dimensional image display panel 80 formed in this orderfrom the bottom, and the liquid crystal panel 50 is adhered to the touchand three-dimensional image display panel 80 through an adhesive layer55. Here, the adhesive layer 55 is a double-sided adhesive agent.

Like a conventional liquid crystal panel, the liquid crystal panel 50includes first and second substrates 10 and 20 facing each other, aliquid crystal layer 25 filled between the first and second substrates10 and 20, a color filter layer formed on the second substrate 20, and afirst polarizing plate 31 and a second polarizing plate 32 formed on theouter surfaces of the first and second substrates 10 and 20,respectively.

Also, the touch and three-dimensional image display panel 80 includes athird substrate (lower substrate) 81 provided with electrodes 91 a and91 b made of a transparent material for realizing a three-dimensionalimage, a fourth substrate (upper substrate) 82 provided with electrodes83 and 86 made of a transparent material for sensing touch and a blackmatrix layer 87, and a liquid crystal layer 90 filled between the thirdand fourth substrates. Here, the fourth substrate 82 is formed of ahardened glass substrate.

The touch and three-dimensional image display panel 80 includes aplurality of electrodes 83 (Rx) for sensing touch formed on the fourthsubstrate 82, a protective film 84 formed over the entire surface of thefourth substrate 82 including the plurality of electrodes 83, and aplurality of electrodes 86 (Tx) for sensing touch formed on theprotective film 84. Here, the electrodes 83 and 86 for sensing touch maybe realized with various methods.

The touch and three-dimensional image display panel 80 includes aprotective film 85 formed on the protective film 84 including theelectrodes 86, a black matrix layer 87 formed on the protective film 85,an over-coating layer 88 formed on the protective film 85 including theblack matrix layer 87, a transparent common electrode 93 to realize athree-dimensional image formed on the over-coating film 88, aninsulating film (not shown) formed over the entire surface of the commonelectrode 93, and a column spacer 89 formed on the insulating film.

A plurality of electrodes 91 a and 91 b to realize a three-dimensionalimage and protective films 92 a and 92 b are formed on the thirdsubstrate 81 of the touch and three-dimensional image display panel 80.

The third substrate 81 and the fourth substrate 82 thus formed arejoined to each other through a sealant (not shown) such that they faceeach other and a liquid crystal layer 90 is formed between the third andfourth substrates.

The third substrate 81 of the touch and three-dimensional image displaypanel 80 and the liquid crystal panel 50 are adhered to each otherthrough the adhesive 55.

A method for manufacturing a liquid crystal display device having touchand three-dimensional display functions according to the firstembodiment of the present invention will be described in detail.

FIG. 3A to 3E are a plan view and a sectional view illustrating themethod for manufacturing the liquid crystal display device having touchand three-dimensional display functions according to the firstembodiment of the present invention, and specifically, a plan view and asectional view illustrating a process of a lower substrate (thirdsubstrate) of the touch and three-dimensional image display panel.

As shown in FIG. 3A, routing lines 94 a and 94 b to realizethree-dimensional images are formed on the edge of the third substrate81 of the touch and three-dimensional image display panel 80.

As shown in FIG. 3B, a protective film 96 is formed over the entiresurface of the third substrate 81 including the routing lines 94 a and94 b and is then selectively removed, to form a plurality of contactholes 97 in one routing line 94 b of the routing lines 94 a and 94 b.

As shown in FIG. 3C, a transparent conductive layer is deposited on theprotective film 96 including the plurality of contact holes 97 and isselectively removed to form a plurality of even electrodes 98 such thatthe even electrodes 98 are electrically connected to the routing line 94b through the contact holes 97.

As shown in FIG. 3D, a protective film 99 is formed over the entiresurface of the protective film 96 including the even electrodes 98 andthe protective film 99 is selectively removed through an etching processusing a mask to form a plurality of contact holes 100 in the routingline 94 a.

As shown in FIG. 3E, a transparent conductive layer is deposited overthe protective film 99 including the contact holes 100 and isselectively removed to form a plurality of odd electrodes 101 such thatthe odd electrodes 101 are electrically connected to the routing line 94a through the contact holes 100. Also, an insulating film (not shown) isformed over the resulting structure.

Although not shown, after the protective films are formed and thecontact holes are then formed, pad portions of the routing lines areexposed.

Also, a method for manufacturing an upper substrate (fourth substrate)of the touch and three-dimensional image display panel will be describedin detail.

FIGS. 4A to 4E are a plan view and a sectional view illustrating amethod for manufacturing the liquid crystal display device having touchand three-dimensional display functions according to the firstembodiment and specifically, are a plan view and a sectional viewillustrating a process of the upper substrate (fourth substrate) of thetouch and three-dimensional image display panel.

As shown in FIG. 4A, routing lines 111 a and 111 b for sensing touch areformed on the edge of the fourth substrate 82 of the touch andthree-dimensional image display panel 80.

As shown in FIG. 4B, a transparent conductive layer is deposited on thefourth substrate 82 and is selectively removed to form a plurality ofbridges 112 to connect electrodes arrayed in an X axis.

As shown in FIG. 4C, a protective film 113 is formed over the entiresurface of the fourth substrate 82, and the protective film 113 isselectively removed through an etching process using a mask to form aplurality of contact holes 114 in the routing lines 111 a and 111 b andthe bridges 112.

As shown in FIG. 4D, a transparent conductive layer is deposited overthe entire surface of the protective film 113 to form a plurality of X-and Y-axial electrodes 115 and 116. Here, the X-axial electrodes 115 areconnected to one another through the bridges 112. The X-axial electrodes115 are connected to the routing lines 111 a, and the Y-axial electrodes116 are connected to the routing lines 111 b.

Although an example in which the X- and Y-axial electrodes 115 and 116are formed in the same layer is illustrated in FIG. 4D, the presentinvention is not limited to this example, the electrodes (represented byreference numerals “83” and “86” in FIG. 2) may be formed in differentlayers, as shown in FIG. 2. That is, FIG. 2 illustrates a configurationin which the X-axial electrode is isolated from the Y-axial electrodethrough the protective film and FIG. 4D illustrates a configuration inwhich the X-axial and Y-axial electrodes are formed in the same layerand the X-axial electrodes are connected to one another through thebridges. In the present invention, the both cases may be used and otherelectrode patterns may be also used.

Also, a protective film 117 is formed over the entire surface of thesubstrate including the X-axial electrodes 115 and the Y-axialelectrodes 116.

FIG. 2 illustrates a configuration in which the electrodes 83 and 86 forsensing touch are formed as a double layer structure and FIG. 4illustrates a configuration in which the electrodes 115 and 116 forsensing touch are formed in the same layer. The reason for this is thatthe electrodes for sensing touch may be formed by various methodsdepending on a resistant film method or a capacitive method.

As shown in FIG. 4E, a black matrix layer 87 is formed on the protectivefilm 117.

An over-coating layer 88 is formed on the fourth protective film 117including the black matrix layer 87, a transparent common electrode 93to realize a three-dimensional image is formed on the over-coating film88, an insulating film (not shown) is formed over the entire surface ofthe transparent common electrode 93, and a column spacer 89 is formed onthe insulating film.

Similarly, although not shown, after protective films are formed and thecontact holes are then formed, the pad portion of the routing lines isexposed.

The third substrate 81 and the fourth substrate 82 thus formed arejoined to each other using a sealant (not shown) such that the thirdsubstrate 81 faces the fourth substrate 82, and a liquid crystal layer90 is formed between the third and fourth substrates to completeformation of the touch and three-dimensional image display panel.

Also, the touch and three-dimensional image display panel is adhered tothe liquid crystal panel through an adhesive.

According to the first embodiment, the black matrix layer 87 is formedon the touch electrode, but the present invention is not limitedthereto.

Second Embodiment

FIG. 5 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a second embodiment of the present invention.

Before formation of the X- and Y-axial electrodes for sensing touch, ablack matrix layer 87 is formed on the fourth substrate 82, and touchelectrodes and a common electrode are sequentially formed thereon.

That is, as shown in FIG. 5, a black matrix layer 87 is formed on thefourth substrate 82 of the touch and three-dimensional image displaypanel 80, an over-coating layer 88 is formed on the fourth substrate 82including the black matrix layer 87, X-axial (first) electrodes 83 (Rx)for sensing touch is formed, a first protective film 84 is formed overthe over-coat layer 88 including the third electrodes 83, and Y-axial(second) electrodes 86 (Tx) for sensing touch are formed on the firstprotective film 84. Here, the first and second electrodes for sensingtouch may be realized by various methods.

A second protective film 85 is formed on the first protective film 84including the second electrode 86, a transparent common electrode 93 torealize a three-dimensional image is formed on the second protectivefilm 85, an insulating film (not shown) is formed over the entiresurface of the common electrode 93, and a column spacer 89 is formed onthe insulating film.

The configuration of the third substrate is the same as in FIG. 2illustrating the first embodiment of the present invention.

Third Embodiment

Meanwhile, the touch electrode and the electrode for displaying athree-dimensional image may be formed on the same substrate. Such aconfiguration will be described in detail below.

FIG. 6 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to a third embodiment of the present invention.

First, as shown in FIG. 6, the liquid crystal display device havingtouch and three-dimensional display functions according to the thirdembodiment of the present invention broadly includes a liquid crystalpanel 50, and a touch and three-dimensional image display panel 80arranged in this order from the bottom, and the liquid crystal panel 50is adhered to the touch and three-dimensional image display panel 80through an adhesive layer 55. Here, the adhesive layer 55 comprises adouble-sided adhesive.

Like a conventional liquid crystal panel, the liquid crystal panel 50includes first and second substrates 10 and 20 facing each other, aliquid crystal layer 25 filled between the first and second substrates10 and 20, a color filter layer formed on the second substrate 20, and afirst polarizing plate 31 and a second polarizing plate 32 formed onouter surfaces of the first and second substrates 10 and 20,respectively.

Also, the touch and three-dimensional image display panel 80 includes afourth substrate (upper substrate) 82 provided with electrodes 83 and 86for sensing touch, and electrodes 91 a and 91 b for displayingthree-dimensional images, a third substrate 81 provided with a blackmatrix layer 87 and a common electrode 93, and a liquid crystal layer 90filled between the third and fourth substrates 81 and 82. Here, thefourth substrate 82 may be a tempered glass substrate.

A black matrix layer 87 is formed on the third substrate 81, anover-coating layer 88 is formed over the entire surface of the substrateincluding the black matrix layer 87, a transparent common electrode 93for displaying a three-dimensional image is formed on the over-coatingfilm 88, and a column spacer 89 is formed on the common electrode 93.

Electrodes 83 and 86 for sensing touch are formed on the fourthsubstrate 82 of the touch and three-dimensional image display panel 80,and electrodes 91 a and 91 b for displaying three-dimensional images areformed on the electrodes 83 and 86. In this case, the respectiveelectrodes 83, 86, 91 a and 91 b are electrically isolated from oneanother through protective films 92 a, 92 b, 92 c, 84, and 85. Here, theelectrodes for sensing touch may be realized by various methods, asshown in FIGS. 2 and 4.

The third substrate 81 and the fourth substrate 82 thus formed arejoined to each other through a sealant (not shown) such that the thirdsubstrate 81 faces the fourth substrate 82, and the liquid crystal layer90 is formed between the third and fourth substrates.

The third substrate 81 of the touch and three-dimensional image displaypanel 8 is adhered to the liquid crystal panel 50 through the adhesive55.

The method for manufacturing the liquid crystal display device havingtouch and three-dimensional display functions according to the thirdembodiment of the present invention will be described in detail.

FIGS. 7A to 7I are a plan view and a sectional view illustrating theliquid crystal display device having touch and three-dimensional displayfunctions according to the third embodiment of the present invention andare a plan view and a sectional view illustrating the process of thefourth substrate (upper substrate) of the touch and three-dimensionalimage display panel.

As shown in FIG. 7A, routing lines 94 a and 94 b for realizingthree-dimensional images and X- and Y-axial routing lines 111 a and 111b for sensing touch are formed on an edge of the fourth substrate 82 ofthe touch and three-dimensional image display panel 80.

As shown in FIG. 7B, a protective film 92 a is formed over the entiresurface of the fourth substrate 82 including the routing lines 94 a, 94b, 111 a and 111 b, and the protective film 92 a is then selectivelyremoved through an etching process using a mask, to form a plurality ofcontact holes 114 a in the Y-axial routing line 111 a among the routinglines 111 a and 111 b for sensing touch.

As shown in FIG. 7C, a transparent conductive layer is deposited overthe entire surface of the protective film 92 a including the pluralityof contact hole 114 a and is then selectively removed, to form aplurality of electrodes 83 (Rx) for sensing touch such that theelectrode 83 are electrically connected to the Y-axial routing lines 111a through the contact holes 114 a.

As shown in FIG. 7D, a protective film 92 b is formed over the entiresurface of the substrate and is then selectively removed through anetching process using a mask the protective film 92 b to form aplurality of contact holes 114 b in the X-axial routing line 111 b amongthe routing lines 111 a and 111 b.

As shown in FIG. 7E, a transparent conductive layer is deposited on theprotective film 92 b and is selectively patterned to form electrodes 86(Tx) for sensing touch such that the electrode 86 are electricallyconnected to the X-axial routing lines 111 b through the contact holes114 b.

As shown in FIG. 7F, a protective film 92 c is formed over the entiresurface of the substrate including the electrodes 86 and is thenselectively removed through an etching process using a mask theprotective film 92 c to form a plurality of contact holes 97 on therouting line 94 a among the routing lines 94 a and 94 b for displayingthe three-dimensional image.

As shown in FIG. 7G, a transparent conductive layer is deposited on theprotective film 92 c and is then selectively removed, to form aplurality of even electrodes 91 a such that the even electrodes areelectrically connected to the routing line 94 a through the contact hole97.

As shown in FIG. 7H, a protective film 84 is formed over the entiresurface of the protective film 92 c including the even electrodes 91 aand is then selectively removed through an etching process using a maskto form a plurality of contact holes 98 in the routing line 94 b.

As shown in FIG. 7I, a transparent conductive layer is deposited overthe protective film 84 including the contact holes 98 and is thenselectively removed, to form a plurality of odd electrodes 91 b suchthat the odd electrodes 91 b are electrically connected through thecontact holes 98 to the routing line 94 b. Also, a protective film 85 isformed over the entire surface of the resulting structure.

Similarly, although not shown, after the protective films are formed andthe contact holes are then formed, the pad portion of the routing linesis exposed.

Also, as shown in FIG. 6, a black matrix layer 87 is formed on the thirdsubstrate 81 of the touch and three-dimensional image display panel, anover-coating layer 88 is formed over the third substrate 81 includingthe black matrix layer 87, a transparent common electrode 93 forrealizing a three-dimensional image is formed over the over-coatinglayer 88 and a column spacer 89 is formed on the common electrode 93.

The third substrate 81 and the fourth substrate 82 thus are joined toeach other using a sealant (not shown) such that the third substrate 81faces the fourth substrate 82, and a liquid crystal layer 90 is formedbetween the third and fourth substrates 81 and 82 to complete formationof the touch and three-dimensional image display panel.

Also, the touch and three-dimensional image display panel 8 is adheredto the liquid crystal panel 95 through an adhesive 55.

Fourth Embodiment

Narrow bezel models having a narrow bezel region, excluding a pixelarray region, in order to make the pixel array region displaying animage wide as possible at a predetermined size are being introduced.

A configuration of the liquid crystal display device having touch andthree-dimensional display functions and a method for manufacturing thesame, which are suitable for realization of the narrow bezel asdescribed above will be described in detail.

FIG. 8 is a sectional view illustrating a configuration of a liquidcrystal display device having touch and three-dimensional displayfunctions according to the fourth embodiment.

First, as shown in FIG. 8, the liquid crystal display device havingtouch and three-dimensional display functions according to the fourthembodiment broadly includes a liquid crystal panel 50 and a touch andthree-dimensional image display panel 80 disposed in this order from thebottom, and the liquid crystal panel 50 is adhered to the touch andthree-dimensional image display panel 80 through an adhesive layer 55.Here, the adhesive layer 55 comprises a double-sided adhesive.

Like a conventional liquid crystal panel, the liquid crystal panel 50includes first and second substrates 10 and 20 facing each other, aliquid crystal layer 25 filled between the first and second substrates10 and 20, a color filter layer formed on the second substrate 20, and afirst polarizing plate 31 and a second polarizing plate 32 formed onouter surfaces of the first and second substrates 10 and 20,respectively.

Also, the touch and three-dimensional image display panel 80 includes afourth substrate (upper substrate) 82 provided with electrodes 83 and 86for sensing touch and electrodes 91 a and 91 b for realizingthree-dimensional images, a third substrate (lower substrate) 81provided with a black matrix layer 87 and a common electrode 93, and aliquid crystal layer 90 filled between the third and fourth substrates81 and 82. Here, the fourth substrate 82 is formed of a tempered glasssubstrate.

A black matrix layer 87 is formed on the third substrate 81, and anover-coating layer 88 is formed over the entire surface of the substrateincluding the black matrix layer 87, a transparent common electrode 93for realizing three-dimensional images is formed on the over-coatingfilm 88 and a column spacer 89 is formed on the common electrode 93.

Electrodes 83 and 86 for sensing touch are formed on the fourthsubstrate 82 of the touch and three-dimensional image display panel 80,and electrodes 91 a and 91 b for realizing three-dimensional images areformed on the electrodes 83 and 86. In this case, the respectiveelectrodes 83, 86, 91 a, and 91 b are electrically isolated from oneanother through the protective films 92 a, 92 b and 84.

Here, the electrodes for sensing touch are formed by a method which isdifferent from that of the first to third embodiments.

That is, in order to provide the liquid crystal display device havingtouch and three-dimensional display functions, suitable for the narrowbezel model, a plurality of routing lines 111 a and 111 b for sensingtouch are formed in a display region and a plurality of touch electrodes83 and 86 are formed in the routing lines such that they correspond toone-to-one the routing lines.

When 160 routing lines 111 a and 111 b are formed, 160 touch electrodesare also formed.

The third substrate 81 and the fourth substrate 82 are joined to eachother through a sealant (not shown) such that they face each other, anda liquid crystal layer 90 is formed between the third and fourthsubstrates.

The third substrate 81 of the touch and three-dimensional image displaypanel 80 and the liquid crystal panel 50 are adhered through theadhesive 55.

A method for manufacturing a liquid crystal display device having touchand three-dimensional display functions according to the fourthembodiment of the present invention will be described in detail.

FIG. 9A to 9G are a plan view and a sectional view illustrating themethod for manufacturing the liquid crystal display device having touchand three-dimensional display functions according to the fourthembodiment of the present invention, and specifically, a plan view and asectional view illustrating a process of a upper substrate (fourthsubstrate) of the touch and three-dimensional image display panel.

As shown in FIG. 9A, a plurality of routing lines 94 a and 94 b forrealizing three-dimensional images are formed on the edge of the fourthsubstrate 82 of the touch and three-dimensional image display panel 80,and a plurality of routing lines 111 a and 111 b for sensing touch areformed in the center thereof corresponding to a display region.

As shown in FIG. 9B, a protective film 92 a is formed over the entiresurface of the fourth substrate 82 including the routing lines 94 a, 94b, 111 a and 111 b, and is then selectively removed through an etchingprocess using a mask the protective film 92 a to form a plurality ofcontact holes 114 a in the respective routing lines 111 a and 111 b forsensing touch.

As shown in FIG. 9C, a transparent conductive layer is deposited theprotective film 92 a including the contact holes 114 a and is thenselectively removed to form a plurality of electrodes 83 and 86 forsensing touch such that they are electrically connected to therespective routing lines 111 a and 111 b through the contact holes 114a.

As shown in FIG. 9D, a protective film 92 b is formed over the entiresurface of the substrate and is selectively removed through an etchingprocess using a mask the protective film 92 b to form a plurality ofcontact holes 97 in the routing line 94 a among the routing lines 94 aand 94 b for displaying three-dimensional images.

As shown in FIG. 9E, a transparent conductive layer is deposited overthe protective film 92 b and is then selectively removed to form aplurality of even electrodes 91 such that they are electricallyconnected to the routing line 94 a through the contact holes 97.

As shown in FIG. 9F, a protective film 84 is formed over the entiresurface of the protective film 92 b including the even electrodes 91 aand is then selectively removed through an etching process using a mask,to form a plurality of contact holes 98 in the routing line 94 b.

As shown in FIG. 9G, a transparent conductive layer is deposited on theprotective film 84 including the contact holes 98 and is selectivelyremoved, to form a plurality of odd electrodes 91 b such that they areelectrically connected to the routing line 94 b through the contactholes 98. Also, an insulating film 85 is formed over the entire surfaceof the resulting structure.

Also, as shown in FIG. 8, a black matrix layer 87 is formed on the lowersubstrate (third substrate) 81 of the touch and three-dimensional imagedisplay panel, an over-coating layer 88 is formed on the substrate 81including the black matrix layer 87, a transparent common electrode 93for realizing three-dimensional images is formed on the over-coatinglayer 88 and a column spacer 89 is formed on the common electrode 93.

The third substrate 81 and the fourth substrate 82 thus formed arejoined to each other using a sealant (not shown) such that the thirdsubstrate 81 faces the fourth substrate 82, and a liquid crystal layer90 is formed between the third and fourth substrates to completeformation of the touch and three-dimensional image display panel.

Also, the touch and three-dimensional image display panel 8 is adheredto the liquid crystal panel 95 through an adhesive 55.

Fifth Embodiment

The first to fourth embodiments illustrate examples in which the fourthsubstrate (upper substrate) is formed of a tempered glass substrate.

However, the present invention is not limited to these examples. Forexample, rigidity of a substrate can be secured by using a polarizedglass substrate, instead of the tempered glass substrate, andhard-coating the upper surface of the polarized glass substrate.

Also, instead of the hard coating, a tempered glass substrate may beadhered to the polarized glass substrate through an adhesive. That is,in order to prevent an increase in size, the polarized glass substrateis etched and a tempered glass substrate is adhered thereto.

The electrode for sensing touch may have a configuration shown in FIG.4D, or may have a configuration, as shown in FIGS. 7C and 7D.

As apparent from the fore-going, the liquid crystal display devicehaving touch and three-dimensional display functions and a method formanufacturing the same according to the present invention have thefollowing advantages.

A three-dimensional image display panel includes electrodes for sensingtouch, thus eliminating the necessity of separate electrodes for touchpanels and decreasing a weight and thickness of the liquid crystaldisplay device. Also, only one adhesive is used, thus simplifying theoverall manufacture process and reducing manufacture costs.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the inventions. Thus, itis intended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

What is claimed is:
 1. A liquid crystal display device comprising atouch and three-dimensional image display panel adhered to a liquidcrystal panel through an adhesive layer, wherein the touch andthree-dimensional image display panel comprises: a lower substrateprovided with first and second electrodes for realizing athree-dimensional image; a upper substrate provided with third andfourth electrodes for sensing touch and a common electrode for realizingthe three-dimensional image; and a liquid crystal display filled betweenthe upper and lower substrates.
 2. A liquid crystal display devicecomprising a touch and three-dimensional image display panel adhered toa liquid crystal panel through an adhesive layer, wherein the touch andthree-dimensional image display panel comprises: a upper substrateprovided with third and fourth electrodes for sensing touch and firstand second electrodes for realizing a three-dimensional image; a lowersubstrate provided with a common electrode for realizing thethree-dimensional image; and a liquid crystal display filled between theupper and lower substrates.
 3. A liquid crystal display devicecomprising a touch and three-dimensional image display panel adhered toa liquid crystal panel through an adhesive layer, wherein the touch andthree-dimensional image display panel comprises: a upper substrateprovided with a plurality of routing lines for sensing touch, routinglines for realizing a three-dimensional image, electrodes for sensingtouch, and electrodes for realizing the three-dimensional image; a lowersubstrate provided with a common electrode to realize thethree-dimensional image; and a liquid crystal display filled between theupper and lower substrates, wherein the routing lines for realizing athree-dimensional image are disposed on an edge of the upper substrate,the routing lines for sensing touch are disposed in the center thereof,and the electrodes for sensing touch correspond one-to-one to therouting lines for sensing touch.
 4. The liquid crystal display deviceaccording to claim 1, wherein the upper substrate is formed of atempered glass substrate.
 5. The liquid crystal display device accordingto claim 1, wherein the upper substrate or the lower substrate furthercomprises a black matrix layer.
 6. The liquid crystal display deviceaccording to claim 1, wherein the upper substrate is formed of apolarized glass substrate having a hard-coated surface.
 7. A method formanufacturing a liquid crystal display device comprising a touch andthree-dimensional image display panel adhered to a liquid crystal panelthrough an adhesive layer, the method comprising: forming first andsecond routing lines for realizing a three-dimensional image on a lowersubstrate of the touch and three-dimensional image display panel;forming a first protective film over the entire surface of the lowersubstrate including the first and second routing lines and forming aplurality of first contact holes in the first routing line; forming aplurality of first electrodes on the first protective film such that thefirst electrodes are electrically connected to the first routing linethrough the first contact holes; forming a second protective film overthe entire surface of the lower substrate including the first electrodesand forming a plurality of second contact holes in the second routingline; forming a plurality of second electrodes on the second protectivefilm such that the second electrodes are electrically connected to thesecond routing line through the second contact holes; forming third andfourth routing lines for sensing touch on an upper substrate of thetouch and three-dimensional image display panel; forming a plurality ofbridges on the upper substrate to connect electrodes arrayed in anX-axis direction; forming a third protective film over the entiresurface of the substrate and forming a plurality of third contact holesin the third and fourth routing lines and the bridges; forming X- andY-axial electrodes on the third protective film such that the X- andY-axial electrodes are connected to the third and fourth routing linesand the bridges through the third contact holes; forming a fourthprotective film over the entire surface of the substrate; forming acommon electrode for realizing the three-dimensional image on the fourthprotective film; and joining the upper substrate and the lower substratesuch that the upper substrate faces the lower substrate, and forming aliquid crystal layer between the upper substrate and the lowersubstrate.
 8. A method for manufacturing a liquid crystal display devicecomprising a touch and three-dimensional image display panel adhered toa liquid crystal panel through an adhesive layer, the method comprising:forming first and second routing lines for sensing touch and third andfourth routing lines for realizing a three-dimensional image on an uppersubstrate of the touch and three-dimensional image display panel;forming a first protective film over the entire surface of the substrateincluding the first to fourth routing lines and forming a plurality offirst contact holes in the first routing lines for sensing touch;forming a plurality of first electrodes on the first protective filmsuch that the first electrodes are electrically connected to the firstrouting lines through the first contact holes; forming a secondprotective film over the entire surface of the substrate and forming aplurality of second contact holes in the second routing lines; forming aplurality of second electrodes on the second protective film such thatthe second electrodes are electrically connected to the second routinglines through the second contact holes; forming a third protective filmover the entire surface of the substrate and forming a plurality ofthird contact holes in the third routing line for displaying athree-dimensional image; forming a plurality of third electrodes on thethird protective film such that the third electrodes are electricallyconnected to the third routing line through third contact holes; forminga fourth protective film over the entire surface of the substrateincluding the third electrodes and forming a plurality of fourth contactholes in the fourth routing line; forming a plurality of fourthelectrodes on the fourth protective film such that the fourth electrodesare electrically connected through the fourth contact holes to thefourth routing line; forming a common electrode for realizing thethree-dimensional image on a lower substrate of the touch andthree-dimensional image display panel; and joining the upper substrateto the lower substrate such that the upper substrate faces the lowersubstrate, and forming a liquid crystal layer between the uppersubstrate and the lower substrate.
 9. A method for manufacturing aliquid crystal display device comprising a touch and three-dimensionalimage display panel adhered to a liquid crystal panel through anadhesive layer, the method comprising: forming first and second routinglines for realizing a three-dimensional image on an edge of a uppersubstrate of the touch and three-dimensional image display panel andforming a plurality of third routing lines for sensing touch in acentral portion of the upper substrate, corresponding to a displayregion; forming a first protective film over the entire surface of theupper substrate and forming a plurality of first contact holes in thethird routing lines for sensing touch, respectively; forming a pluralityof first electrodes on the first protective film such that the firstelectrodes are electrically connected through the first contact holes tothe third routing lines, respectively; forming a second protective filmover the entire surface of the substrate and forming a plurality ofsecond contact holes in the first routing line for displaying athree-dimensional image; forming a plurality of second electrodes on thesecond protective film such that the second electrodes are electricallyconnected to the first routing line through the second contact holes;forming a third protective film over the entire surface of the substrateand forming a plurality of third contact holes in the second routingline; forming a plurality of third electrodes on the third protectivefilm such that the third electrodes are electrically connected to thesecond routing line through the third contact holes; forming a commonelectrode for realizing the three-dimensional image on a lower substrateof the touch and three-dimensional image display panel; and joining theupper substrate to the lower substrate such that the upper substratefaces the lower substrate, and forming a liquid crystal layer betweenthe upper substrate and the lower substrate.
 10. The method according toclaims 7, further comprising forming a column spacer on the uppersubstrate or the lower substrate.
 11. The method according to claim 7,further comprising forming a black matrix layer on the upper substrateor the lower substrate.
 12. The method according to claim 7, wherein atempered glass substrate is used as the upper substrate.
 13. The methodaccording to claim 7, wherein a hard-coated polarized glass substrate isused as the upper substrate.